Mistakes in a Song A random sample of six music students played a short song, and the number of mistakes in music each student made was recorded. After they practiced the song 5 times, the number of mistakes each student made was recorded. The data are shown. At a=0.05, can it be concluded that there was a decrease in the mean number of mistakes? Assume that all variables are normally or approximately normally distributed. Let u₁ be the mean before and HD H1 H2. Use the P-value method and a TI-83 Plus/TI-84 Plus calculator. Student A B C D F Before 12 14 9 8 8 4 After 11 12 5 7 13 3 Send data to Excel Part: 0/4 Part 1 of 4 (a) State the hypotheses and identify the claim with the correct hypothesis. □<□ 0>0 ローロ H₁: (Choose one) H₁: (Choose one) □≠□ HD Submit Assic

What does hypothesis test indicates?

Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below. Does an employee’s attitude affect their job performance?   Performance 59 63 65 69 58 77 76 69 70 64 Attitude 72 67 78 82 75 87 92 83 87 78   What is the test statistic for this hypothesis test, critical value, pvalue of the hypothesis test?

Hypothesis testing will consist of four hypothesis tests which you need to complete. While you will not need to show your work or upload any files, each test will require the following: Type of Test: Null Hypothesis: Alternate Hypothesis: SE: Test Statistic: P-value: Decision: Sentence:

The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.

What is all about the Test of Goodness of Fit and the Test of Independence? Give example.

Does more education lower a person’s level of prejudice? The number of years of education and the score on a prejudice test for ten people is given in the following table. Higher scores on the test indicate more prejudice.   Years of Education: 12, 15, 14, 13, 18, 10, 16, 12, 10, 4 Score of Prejudice Test: 1, 6, 2, 3, 2, 4, 1, 5, 5, 10   Conduct a hypothesis test to determine if there is a significant linear correlation between the two variables. If there is a significant linear correlation between the variables, determine the regression equation.  There is a significant correlation between the variables and the regression equation is y' = 10.5 - 0.532x  There is a significant correlation between the variables and the regression equation is y' = - 0.532 + 10.5x  There is not a significant correlation between the variables, so the regression equation should not be determined.  There is a significant correlation between the variables and the regression equation is y' = 16.509 - 1.054x

Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 600 randomly selected adults showed that 62​% of them would erase all of their personal information online if they could. Find the value of the test statistic.

The table to the right contains observed values and expected values in parentheses for two categorical variables, X and Y, where variable X has three categories and variable Y has two categories. Use the table to complete parts (a) and (b) below. EQuestion Help X, X2 32 44 51 (35.39)(44.42)(47.19 19 20 17 (15.61)(19.58)(20.81) O B. H,: The Y category and X category have equal proportions. H,: The proportions are not equal. OC. Hn: The Y category andX category are dependent. H,: The Y category and X category are independent. OD. Ho: H -E, and Hy =E, H: H #E, or H, 7E, What is the P-value? P-value = (Round to three decimal places as needed.) Enter your answer in the answer box and then click Check Answer. port

A hypothesis test is conducted to determine whether the percentage of US adults that think marijuana should be illegal is less than 40%.  A random sample of 400 US adults includes 144 that think marijuana should be illegal.   The value of the test statistic is -1.63 Find the P-value of the hypothesis test